I've had f2 errors where the problem was a thermal fuse. Usually I test probe and fuse (if there is one), and reset ecm if possible before I replace a board on any oven, regardless of manufacturer or error codes.

With regards to tech sheet writers, the following question and response was found on 85 % of their requirement exams...

The problem is, their examiners consider it the correct answer.

Source: GE Oven Mod#JTP95WCW1WW F2 error code